Hammer head



FIG. 1 is a right side elevational view of a hammer head showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof;

The handle is shown in broken lines in FIGS. 1-3 for illustrative purposes only. 

The ornamental design for a hammer head, as shown and described. 